I just did a clean install of XP on a 10GB partition (don't make it any smaller as some programs insist on installing on the C: ). I then install all Microsoft updates and change any settings i like (single click to open folders, pagefile size etc).
I then install Acronis True Image on to my D:, get it to make a complete copy of my C: and save it on my D:. Now if i want to reinstall my operating system i simply open Acronis True Image up and select 'Recovery'. point it to my backup and go have a cup of Coffee
All my programs are installed on my D: as well
